Chimney Care Company's Blog
Getting Optimum Draft
Your Chimney’s Draft, And How It Can Be Compromised
As comprehensive chimney and fireplace service professionals, the techs at the Chimney Care Co. tend to talk about draft a lot — it’s pretty much the key to your chimney’s proper function, so maintaining draft is key to what we do, too.
The Chimney Safety Institute of America has a detailed breakdown of the science behind how your chimney works, but if you want the chimney draft CliffsNotes, here’s a simple breakdown.
Not only does optimum draft increase effectiveness and performance, it also minimizes risks.
Draft is, more or less, how air draws up your flue. And it occurs because of a difference in pressure between the hot air produced by your fire and the cooler air outside your flue. When heated air is getting produced by your fire, some degree of draft will happen, but what you really need is optimum draft — the proper level of upward pull, which happens when your chimney system is properly built, in top shape, under optimum burning conditions.
That probably sounds like a tall order, all those optimums. But that’s what we do at the Chimney Care Co.: We use the right methods, tools and expertise to get your chimney system set up for optimum draft.
What Can Stop Optimum Draft?
Ensuring optimum draft means getting rid of all the things that hinder draft. Wondering what those things are? Here are a few of the most common problems:
Blockages
This one’s kind of a given: If something is blocking off your flue, air can’t flow like it should. The most common flue blockages are usually an indication of another problem, like a missing chimney cap allowing animals to nest in the chimney, pieces of a damaged chimney liner falling into the flue, or excess amounts of creosote being present because of an overdue chimney sweeping appointment.
Improperly Sized Flue
Heating appliances are designed to vent through a specifically sized flue. A flue that’s too small leaves you with weak draft and smoking issues. A flue that’s too large generally draws too slowly leading to poor venting, increased levels of creosote and often liner and masonry damage from acidic condensate, too. The mismatch in sizes sometimes happens when a new appliance is installed to vent with an existing chimney, and the flue size isn’t taken into consideration. The most effective solution: having a new stainless steel flue liner installed to bring the flue to its proper size.
Your Appliance Isn’t Getting Enough Air
Fireplaces and stoves need combustion air to encourage draft and keep byproducts and smoke moving in the right direction. If you’re having issues with smoke coming into your living area and your home has energy-efficient windows and doors, those energy savers might be keeping your fire from getting enough air. Try cracking a window and see if it helps.
You’re Using The Wrong Fuel
If you have a wood-burning appliance, here’s one rule that has no exception: Burn seasoned or kiln-dried wood, always. Burning improperly dried wood leads to a fire that doesn’t burn hot enough, which means a weak draft and increased creosote. If you’re collecting and cutting your own wood, let it dry for six months to a year. (Christmas trees and trash: also a no-no as far as proper fireplace or stove use goes.)
If you’re experiencing draft issues, The Chimney Care Co. technicians can inspect your system, find the culprit and offer solutions. If you’d like to schedule an appointment, or ask any questions, just give us a call!